JPS6145931A - Measuring instrument - Google Patents

Abstract

PURPOSE:To improve ability in processing by using a master measuring machine and plural slave measuring machines in combination and setting automatically the shutter width of the master measuring machine on the basis of a target weight which is set to the set value. CONSTITUTION:A master shutter driving part 11 is energized with a signal from an arithmetic control part 16 and measured bodies are supplied to a master pool hopper. Then, a master gate driving part 3' is energized with a signal from the arithmetic control part 16 to supply the measured bodies to a master measuring hopper. The weight from the master measuring machine 1 is inputted to the arithmetic control part 16 through a multiplexer 14 and an A/D converter 15 and stored in a memory. Then, weights from the slave measuring machines 2 are inputted to the arithmetic control part 16 through the multiplexer 14 and A/D converter 15 and stored in the memory. Further, the arithmetic control part 16 performs combinational arithmetic on the basis of the set target weight from a target weight setting part 18 and weights from the master measuring machine 1 and slave measuring machines 2 to adjust automatically the amount of supply to the master measuring machine 1 according to the setting of the target weight.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a weighing device for weighing a long weighing object such as, for example, dried noodles.

(Prior Art) A weighing device as shown in FIG. 5 has conventionally been used to package and take out dried noodles such as soy-fu and hiyamugi in predetermined weight units. In the figure, about 90% of the target weight of a long object to be weighed, such as dried noodles, is supplied to the weighing hopper C by the mass supply section A, and the remainder is supplied to the weighing hopper C from the small quantity supply section B, and the sum of the weights of both. When the weight becomes equal to the target weight, the long weighed object is sent from the weighing hopper C to the packaging machine d, where it is packaged.

(Problems with the prior art) In this way, in the past, about 90% of the target weight was supplied from the mass supply section to the weighing hopper, so the width between the shutters (a) and shutters (b) of the cutout section a was It was adjusted manually. For this reason, it is necessary to manually adjust the shutter width each time the target weight is newly set or the setting is changed, making the operation complicated.

Further, since the shutter width was determined by repeatedly supplying and weighing objects to be measured and repeating trial and error, there was a problem that this process took time and the processing capacity decreased.

(Purpose of the invention) The present invention uses a master weighing machine and a plurality of slave weighing machines in combination, the slave weighing machines perform combined weighing, and the master weighing machine and slave weighing machines determine a target weight of the object. A weighing device that improves throughput by automatically setting the shutter width of the supply device that supplies the object to be weighed to the parent weighing machine based on the set value when the target weight is set or the setting is changed. The purpose is to provide the following.

(Summary of the Invention) The weighing device of the present invention includes a master weighing machine that weighs a predetermined amount of objects to be weighed relative to a set target weight, and a plurality of slave weighing machines that perform combined weighing to weigh the shortfall from the set target weight. The weighing machine is equipped with means for automatically adjusting the amount supplied to the master weighing machine when a new target weight is set or when the setting is changed.

(Example) Hereinafter, an example of the present invention will be described using the drawings.

FIG. 1 is a schematic layout diagram of the present invention. In the figure, the current feeding device A' has a parent shutter Aα and a parent shutter Aβ, and moves up and down in the direction of the arrow to feed a long object to be weighed to the parent pool hopper 3. Then, either game) 3a or 3b of this parent pool hopper 3 is opened, and the parent weighing hopper l
A long object to be measured is supplied to either a or lb. As will be described later, this main weighing machine Aα can also be moved in the horizontal direction of the arrow in order to change the shutter width. The objects ma or mb weighed by the master weighing machine 1 having the master weighing hopper 1 a and the weighing machine 1 having the master weighing hopper ib are discharged into packets 7 and transported by the packet conveyor 8 . Five child feeding devices B' are arranged downstream of the current feeding device A' in the direction of arrow movement of the packet conveyor. Each child feeding device B' is
It has secondary shutters α and β that move up and down, and supplies a long object to be weighed to a secondary pool hopper 4. The secondary pool hopper 4 opens the gate 4a or 4b and weighs the object into a secondary weighing machine 2 consisting of one quick weighing hopper 5 and one weight sensor (not shown).
supply to. The master weighing machine 1 supplies almost a predetermined amount to the set target weight, and discharges the weighed object from the quick weighing hopper 5 of the optimal combination of slave weighing machines to the timing hopper 6, and then the master weighing machine 1 When the object to be weighed, for example, the object to be weighed ma, which has been weighed and discharged into the packet 7, is transferred to the position of the timing hopper 6, the timing hopper 6 is opened,
The weighed object from the weighing machine 2 is discharged into a packet 7. The object to be weighed is further transferred to the sorting hopper 9 by the packet conveyor 8, and when the object to be weighed in the bagent 7 is the correct amount for the set target weight, the correct amount gate 9a is opened and the packing machine 10 is transferred.
The products are supplied to the factory and subjected to predetermined packaging processing. When it is defective, the defective gate 9b is opened and the weighed object in the packet is rejected as a defective item.

FIG. 2 is a schematic block diagram of the present invention.

Next, this block diagram will be explained with reference to FIG. For example, a signal from an arithmetic control section 16 composed of a microcomputer or the like activates the parent shutter drive section 11 that drives the parent shutters Aβ and Aα, and the object to be weighed is supplied to the parent pool hopper 3. Next, the parent gate drive unit 3' is energized by a signal from the arithmetic control unit 16, and either one of the gates 3a, 3b of the parent pool hopper 3 is opened, and the object to be weighed is supplied to the parent weighing hopper, where it is weighed. When an object is weighed and a timing signal from the packaging machine 10 is sent to the calculation control section 16, the weight from the master weighing machine 1 is transferred to the multiplexer 1.
4. The signal is input to the arithmetic control unit 16 through the A/D converter 15 and stored in a predetermined area of the memory. Further, a switching signal is output from the arithmetic control section 16 to the multiplexer 14, and the weights of the slave weighing machines 2 are sequentially taken out from the multiplexer 14, inputted to the arithmetic control section 16 through the A/D converter 15, and stored in a predetermined area of the memory. be remembered. Arithmetic control unit 1
In step 6, a combined target weight of the child weighing machine 20 is calculated using the set target weight set by the target weight setting unit 18 and the weight from the master weighing machine 1, and a combination calculation is executed using the weight from the child weighing machine 2. Note that the upper limit weight setting section 17 is preset with a deviation of the upper limit weight from the set target weight. For example, if the set target weight is 500 g and you want to set the upper limit weight to 505 g, the upper limit weight setting section 17 is set with that deviation. There are 5
Set g. The upper limit weight deviation is input in advance to the arithmetic control unit 16 from the limit weight setting unit 17, and when the combination weight is equal to or greater than the combination target weight, the deviation from this target weight is within the upper limit weight deviation to the combination target weight. A set of combinations that are equal or closest to this are selected as positive combinations.

When selecting a positive weight combination at this time, if two secondary weighing machines 2 that form a pair and are supplied with weighing items from the same pool hopper 4 in the previous weighing are both selected as a positive weight combination. To do this, exclude this paired slave weighing machine from the combination operation, and also make sure that the two paired fast weighing machines @2 do not participate in the combination among the remaining slave weighing machines. , so that there are no duplicates. In addition, in the previous weighing, if there is no slave weighing machine for which both of the two slave weighing machines 2 in a pair were selected as a positive weight combination, in the current combination calculation, each pair of slave weighing machines 2 will be Two slave weighing machines 2
There is no duplication, in which neither of the weighing machines participates in the combination calculation, and there is one pair, in which only one pair of two slave weighing machines participate in the combination calculation. This is because the zero point adjustment is performed on one of the secondary weighing machines for double discharge, so that the zero point adjustment can be performed on the average of all the Kaneko weighing machines, rather than being concentrated only on a specific weighing machine. When a correct quantity combination is determined, the items to be weighed are discharged from the sub-weighing machine 2 selected for that combination and put into the timing hopper 6, then weighed by the master weighing machine and transferred by the packet conveyor 8. /The arithmetic control unit 16 determines that the position of the hecket 7 has reached the bottom of the timing hopper 6,
A signal is sent to the timing hopper drive section 6', and the weighed object is discharged from the timing hopper 6 into a packet 7.

The objects to be weighed in the packet 7 are put into the sorting hopper 9, and if the objects to be weighed in the packet 7 are the correct amount, a signal to open the correct amount gate 9a is sent from the arithmetic control section 16 to the sorting hopper drive section 9'. If it is defective, a signal to open the defective gate 9b is sent from the arithmetic control section 16 to the sorting hopper drive section 9'. The objects to be weighed discharged from the correct weight gate 9a are subjected to predetermined packaging processing by the packaging machine IO, and the objects to be weighed discharged from the defective gate 9b are returned to the parent weight feeder A' or the child feeder B°. Note that the conveyor drive section 8' intermittently transports the packet conveyor 8 at a predetermined speed in response to a signal from the arithmetic control section 16. The shutter width change drive unit 13 is activated by a command from the calculation control unit 16 when changing the width of the parent shutter or child shutter.

FIG. 3 is an explanatory diagram of an overview of the memory within the arithmetic control section 16. Figure 3 (A) shows a parent weight memory PM that stores the weight of the parent weighing machine l, and a parent weight hopper la or 1b.
Area PM that stores the weight of the weighing object to be discharged this time from
A PM2 is provided for storing the weight of the weighed object I and the weight of the weighed object discharged last time. FIG. 3 (b) shows a correct/incorrect flag memory FM that stores whether a correct amount of combination is obtained for the target weight of the combination or whether the combination is defective by the combination calculation by the slave weighing machine 2. timing hopper 6
Area F that stores the correct amount and defective amount of weighed items discharged from
M, and each packet 7 transferred by the packet conveyor 8
It is composed of areas FM2, FM3, etc. that store whether the weighed objects in the hopper 9 are correct or defective, and area FMm that stores the correct or defective amounts of objects to be weighed into the hopper 9. has been done. Figures 83 (C) and (D) are memory for the number of discharges from slave weighing machine 2, Figure 3 (E) is memory for the cumulative number of discharge slave weighing machines of slave weighing machine 2, Figure 3 (F)
is the supply amount change flag of the parent weighing machine 1, which will be described in detail later.

FIG. 4 is a flowchart of the weighing cycle of the weighing device of the present invention. Next, we will explain the operation of the weighing cycle using this flowchart. (1) After confirming that there is a timing signal from the packaging machine IO (step P
1), shift the parent weight memory PM by 1 (step P2
). For example, in the previous weighing, when the weighing object was discharged from the parent weighing hopper la, the weight was stored in the area of the memory PM.
, to shift the stored weight from the area of PM2 to the area of PM2. Next, the weight of the parent weighing machine @i having the previous non-discharging parent weighing machine, in the above example, the parent weighing hopper b, is input and stored in the area of the memory PM (step Pg).

(2) Next, the weights from each slave weighing machine 2 are sequentially input and stored in a memory area (not shown) (step P4
). The arithmetic control unit 16 determines the combined target weight of the slave weighing device 2 from the set target weight set by the target weight setting unit 18.
It is calculated by subtracting the weight stored in the parent weighing memory PM2, that is, the weight ejected from the previous revised planting machine 1 (step P
5). Next, it is checked whether or not there was a duplicate discharge from the previous time, that is, whether or not the weighed items were discharged by both slave weighing machines 2 that are a pair of the two early weighing machines (Step P
s). If there are no duplicate discharges from last time, two units in each pair will be weighed in all quick measurements! 112 does not both participate in the combination calculation, and there is only one pair of slave weighing machines 2.
A combination calculation is performed on the duplicate l pairs in which both participate in the combination calculation, and a combination (equal amount combination) that is equal to or closest to the combination target weight within the combination target weight or higher and within the upper limit weight deviation is determined (step P7). . If there was a double discharge last time, the secondary weighing machine 2 other than the pair that caused the double discharge last time
Then, perform combination calculations without duplication to find one combination (correct combination) that is equal to or closest to the combination target weight, which is greater than or equal to the combination target weight and within the upper limit weight deviation (step P day).
. Next, it is checked whether the parent supply amount change flag is rl (J) (step Ps). At this stage, the current salary amount has not been changed yet, so proceed to step PLO and check whether the regular amount combination has been obtained. cheno (step P1o).

(3) When the positive quantity combination is determined, the number of selected slave weighing machines 2 is added to and stored in the cumulative memory DM (step P11). Subsequently, the discharge number counter memory CI is incremented by 1 (step P12). Next, it is checked whether the value of the counter C1 has reached a predetermined number of times, for example, six times (step Pxg), and the process described below can be repeated until the predetermined number of times is reached. When the value of counter C1 reaches a predetermined number, the next calculation is performed (step PI
4) In other words, whether the value of DM/C1 obtained by dividing the value of the cumulative number of discharger weighing machines DM by the count number of the counter memory C1 is within a predetermined range, for example, within the range of 3°2 to 3.8. Determine.

Here, the reason why the value of DM/C is selected to be 3.2 to 3.8 is that, for example, when there are 10 slave weighing machines 2 and a combination calculation is performed with no overlap and 1 pair overlap, discharge is possible. This is because it is empirically known that the maximum number of units is 5 to 6, and the best combination accuracy is when three to four units, which is approximately 1/2 of that number, are discharged. Therefore, step P
14, the average discharge for a predetermined number of times, for example, 6 times (selection)
This means checking whether the number of weighing machines is within the range of 3.2 to 3.8. DM/C.

If the value of is within the range of 3.2 to 3.8, the counter C1
and clear the cumulative memory DM to zero (step P15).
), proceed to the mouth. If the value of DM'/C is 3.2 or less, it means that the average number of slave weighing machines 2 selected is small.
A signal for narrowing the main shutter width of the current feeding device A' is output to the shutter width changing drive section 13 (-step P17), and the feeding amount is reduced by one pitch between the main shutters Aα and Aβ. 2, the parent supply amount change flag BM is set to rHJ, and the discharge number counter memory C2 is cleared to zero. Here, the discharge counter memory C2 is the parent pool hopper in front of the shutter width change;
This is a memory for counting the number of discharges until the weighing object in the parent weighing hopper is discharged. If the value of DM/C is 3.8 or more, a signal for widening the parent shutter width is output (step PI6), the change flag BM is set to "H", and the counter C2 is cleared to zero (step 21). (4) In step P9, when it is confirmed that the change flag BM is "HJ", that is, the process of step PI8 has been performed, the value of the counter memory C2 is incremented by 1 (step P19), and the counter memory C2 is 3 is reached (step P20).This means that the objects to be weighed in the parent pool hopper and current weighing hoppers la and lb that have already been supplied and loaded with the shutter width before the change are completely discharged. This is to prevent addition and storage in the cumulative memory DM until the measurement is performed (that is, until the third measurement).When the value of the counter memory C2 reaches 3, the counter C1,
The cumulative memory DM is cleared to zero (step P21), and the change flag BM is set to rLJ (step P22).

(5) In the daily accounting process, first check whether there is any double discharge from the previous time (step P2g), and if there is double discharge from the previous time, the slave weighing machine 2 on the non-feeding side of the pair (in one weighing cycle, Of the two secondary weighing machines with double discharge, the object to be weighed is only put into the weighing hopper of one of the secondary weighing machines 2, and the weighing hopper of the other secondary weighing machine 2 is empty.) Zero point adjustment (Step P24). next,
Shift the entire correct/incorrect flag memory FM by one step P25), and set the correct/incorrect result of the combination operation to the memory area F.
It is stored in Ml (step P26). That is, if the combination is correct, "H" is stored in the memory area FM, and if the combination is defective, rLJ is stored in the memory area FM.

Next, it is determined whether the flag memory FMm is "HJ", that is, whether the object to be weighed in the sorting hopper is correct or defective (step P27). If FMm is "H", the object to be weighed in the sorting hopper is judged to be correct Step P2B) to output the gate open signal;
If FMm is not "H", output the defective gate open signal of the sorting hopper (step P29). (6) Next, output the timing hopper open signal Pis
o), the master weight hopper open signal of the master weighing machine 1 stored in step P5 (*1) is outputted (step P?5+) to discharge the weighed items into each packet 7. Next, an operation signal for the parent shutter Aβ is output (step P
52) Move the main shutter Aβ up and down to open the main shutter Aβ
and Aα, and check whether the flag memory FM is rHJ (step P33). F
If M□ is rLJ, it means that the combination is defective. In this case, the early weighing hopper is not opened, and the packet 7 containing only the weighing object discharged from the master weighing machine is transferred to the conveyor drive unit 8.
’ every time a shift signal is input to the sorting hopper 9.
will be transferred to. When FMl is rHJ, a correct amount combination has been obtained, so the early weighing hopper open signal is outputted according to the correct amount combination (step Pg4), and the object to be weighed is discharged from the early weighing hopper to the timing hopper. Next, step Pg5 outputs the open signal of game) 3a or 3b of the parent pool hopper on the side corresponding to the parent weighing machine l that discharged the weighing object.
), parent pool hopper 3 to parent weight hopper la or ib
Insert the object to be weighed. Next, turn the packet conveyor 8
Output a signal to shift (step Pg6), output a signal to open the gate 4a or gate 4b of the child pool hopper 4 corresponding to the quick weighing hopper that discharged the weighed object (step Pa7), Throw the object to be weighed into the quick weighing hopper. Furthermore, an operation signal for the child shutter β of the child feeder B' corresponding to the child pool hopper with the open gate is output (step P58), and the child shutter β is moved up and down to place a meter between the child shutters β and α. The object is supplied, and an operation signal of the child shutter α corresponding to the operated child shutter β is outputted (step Pg9), and the child feeding device B' is transferred from the child feeding device B' to the pool hopper 4 located between the child shutters β and α. Supply the object to be weighed. Finally, the operation signal of the parent shutter Aα is outputted, and the object to be weighed between the parent shutters Aβ and Aα is supplied from the current supply HA to the parent pool hopper 3. Step P
4G), return to A.

FIG. 6 is a flowchart illustrating the procedure of automatically adjusting the main shutter width when the target weight is set or the setting is changed, according to the present invention. Next, the flowchart will be explained.

(1) A target weight W is set by the target weight setting section 18 (step S+). Next, with no object to be weighed between Aα and Aβ of the parent shutter, the parent weight hoppers la and lb and the parent pool hopper 3 are opened to empty each hopper (step S2). Next, as shown in FIG. 6, the group shutter Aα is moved to the position of the group shutter Aβ (step S3).
, determine the reference position, and then move the group shutter Aα by a predetermined pitch in the direction of widening the shutter width (step 3
4).

(2) First move the group shutter Aβ up and down to supply the object to be measured between the group shutters Aβ and Aα, and then the group shutter A
α is moved up and down to supply the object to be weighed between the shutters Aβ and Aα to the parent pool hopper 3, and the gate 3a of the parent pool hopper 3 is opened to feed the object to the parent weighing hopper 1a (step S5). ). Similarly, the shutters Aα and Aβ are sequentially moved up and down to supply the object to be weighed to the parent pool hopper 3, and the gate 3b of the parent pool hopper 3 is opened to throw the object to be weighed into the parent weighing hopper lb (stage 3). 2 pss). Next, input the weights from both parent weighing machines and calculate the average weight W.
a b is calculated (step S7).

(3) Next, the weight WP per pitch of the shutter width is determined by Wp=(Wab/number of pitches of the shutter width) (Step 5).

Next, the deviation weight We is determined by We = WT - (WC + Wa b) (
Step S9). Here, Wc is a preset value of the weight to be weighed by a predetermined number of slave weighing machines (for example, 3 to 4). That is, the deviation weight We is determined by the weight of the set predetermined number of slave weighing machines 2 and the current width of the shutter (step S4).
The graph shows the deviation between the target weight W and the average weight of the parent weighing machine 1 supplied and weighed at a predetermined pitch width. Therefore, the width of the family shutter is adjusted in the following steps so that this deviation weight We becomes zero or almost zero. Furthermore, P= (We
/Wp) is calculated, and a value P' is obtained by converting P into an integer (step S+o). This P' corresponds to the pitch number of the shutter width corresponding to We.

(4) Determine the value of P', and if P'≧1, We >
0, W7 >(WC+Wab)-c' In this case, the group shutter Aα is moved by one pitch P' in the direction of widening the width between the shutters (step 512).
. Also, if P'≦-1-1-, We<O, Wt<
(We + Wa b), so in this case, the group shutter Aα is moved by P,' pitch in the direction of narrowing the width between the shutters (step Stg). When P'=0, the parent shutter width is not changed.

(Effects of the Invention) As explained above, the present invention uses a master weighing machine and a plurality of slave weighing machines in combination, executes combined weighing in the slave weighing machines, and calculates a target weight using the master weighing machine and slave weighing machines. When the target weight is set and the target weight is set, the shutter width of the master weighing machine is automatically set based on the set value, which is much easier than adjusting the shutter width manually through trial and error. The effect is that processing capacity can be improved.

[Brief explanation of drawings]

Figure 1 is a schematic layout diagram of the present invention, Figure 2 is a schematic block diagram of the invention, Figure 3 is an explanatory diagram of the memory, Figure 4 is a flowchart, and Figure 5 is a layout diagram of a conventional example. , FIG. 6 is a flowchart illustrating the procedure for automatically adjusting the parent shutter width. 1... Main weighing machine, 2... Child weighing machine, 3... Parent boule hopper, 3'... Group gate drive section, 4... Child pool hopper, 4'... Child gate driving section , 5... Early weighing hopper, 6... Timing hopper, 6'... Timing hopper drive unit, 7... Packet, 8 river packet conveyor, 8'... Conveyor drive unit, 9... - Sorting hopper, 9'... Sorting hopper drive unit, 10... Packaging machine, 11... Main jitter drive unit, 12... Child shutter drive unit, 13... Shutter width changing drive unit , 14...
・Multiplexer, 15... A/D converter, 16...
- Arithmetic control section, 17... Upper limit weight setting section, 18...
Target weight setting section. Patent applicant: Ishida Kouki Seisakusho Co., Ltd. Representative: Patent attorney: Minoru Tsuji (1 other person) Fig. 3 Hopper (7,) [2d] Discharge count count memory (engineering) [
]C72]! 4p count Kawanfu memory (to) fl
Parent supply presentation change flag □ Kan's 3) (Bad) No - - - R41S (correct quantity) Hand attack 11'35] N△F1 shift t! '7'-II/71:7Paggate (2J7++P-N
≠j rag □′ pi.

Claims (1)

[Claims] A new target weight is set for a weighing machine that consists of a master weighing machine that weighs approximately a predetermined amount of the object relative to the set target weight, and multiple slave weighing machines that perform combined weighing to weigh the shortfall from the set target weight. 1. A weighing device comprising means for automatically adjusting the amount of supply to a master weighing device when a change is made or a setting is changed.